Deck General USCG Question #5166 (Set 160)

The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Weather conditions make it necessary to ballast down to survival draft. It is decided to check the stability at the intermediate draft of 32 feet. If the added ballast has an average VCG of 9.03 feet, what is the new KG?

Official USCG Answer & Rule Citation

Correct Answer: Option C — 57.22 feet

Applying standard moments calculation via shifting weights, the new vertical center of gravity (KG) is determined by taking the sum of vertical moments divided by total displacement, yielding 57.22 feet after ballasting down to the 32-foot intermediate draft.

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